CVE-2026-11788

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:55421
https://access.redhat.com/errata/RHSA-2026:55422
https://access.redhat.com/errata/RHSA-2026:55423
https://access.redhat.com/errata/RHSA-2026:55424
https://access.redhat.com/errata/RHSA-2026:55425
https://access.redhat.com/errata/RHSA-2026:55426
https://access.redhat.com/errata/RHSA-2026:55530
https://access.redhat.com/errata/RHSA-2026:55532
https://access.redhat.com/errata/RHSA-2026:55756
https://access.redhat.com/errata/RHSA-2026:55757
https://access.redhat.com/errata/RHSA-2026:55758
https://access.redhat.com/errata/RHSA-2026:55794
https://access.redhat.com/errata/RHSA-2026:56047
https://access.redhat.com/errata/RHSA-2026:56048
https://access.redhat.com/errata/RHSA-2026:56050
https://access.redhat.com/security/cve/CVE-2026-11788	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2485423	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:directory_server:11.0:::::::*
	cpe:2.3:a:redhat:directory_server:12.0:::::::*
	cpe:2.3:a:redhat:directory_server:13.0:::::::*
	cpe:2.3:o:redhat:389_directory_server:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-06-09 14:16

Updated : 2026-08-18 15:16

NVD link : CVE-2026-11788

Mitre link : CVE-2026-11788

CVE.ORG link : CVE-2026-11788

JSON object : View

Products Affected

redhat

enterprise_linux
389_directory_server
directory_server

CWE

CWE-476

NULL Pointer Dereference

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["cpe:/a:redhat:directory_server:12"], "vendor": "Red Hat", "product": "Red Hat Directory Server 12", "packageName": "redhat-ds:12/389-ds-base", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:directory_server:13"], "vendor": "Red Hat", "product": "Red Hat Directory Server 13", "packageName": "389-ds-base", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "389-ds-base", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unknown"}]}], "published": "2026-06-09T14:16:36.940", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:55421", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55422", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55423", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55424", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55425", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55426", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55530", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55532", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55756", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55757", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55758", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:55794", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:56047", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:56048", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:56050", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-11788", "tags": ["Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485423", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "secalert@redhat.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en 389 Directory Server. El plugin de control de desreferencia no verifica si hay fallas en la asignaci\u00f3n antes de usar una estructura BER, lo que permite a un atacante remoto no autenticado bloquear el servidor LDAP cuando el sistema est\u00e1 bajo presi\u00f3n de memoria."}], "lastModified": "2026-08-18T15:16:48.177", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2A169F6D-88A5-4631-9D30-519350ACFE6E"}, {"criteria": "cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A3DAF61A-58A9-41A6-A4DC-64148055B0C1"}, {"criteria": "cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "904002F4-762C-4CFF-88C4-8FC929774DF8"}, {"criteria": "cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A861110D-0BBC-4052-BBFD-F718F6CD72C5"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}